Here is a screen capture from an app of mine, running under CodeXL.
The numbers sort of seem credible, but I am uncertain about the units. 28,160 KB (aka 28MB) seems possibly credible for static buffers (VBOs, I think) but it seems like that's on the high side. 57,208 KB (57MB) seems high for my texture usage. And 251,743,675 KB (251GB) seems WAAAAAY high for me Render Buffers. I can assure you my computer doesn't have that much memory anywhere, much less on the display chipset.
Are these numbers actually in BYTES, not KILOBYTES?